Administrative overview · FIPS 42085
Mercer County permit authority
The first compliance decision is jurisdictional: identify the office with statutory authority over your parcel, then use its filing and inspection sequence to keep the project moving.
Jurisdictional status
Municipal Fallback
This profile identifies a handoff outside the county’s ordinary structural permitting lane.
Required jurisdiction check
Confirm the controlling local or state authority before filing.
The record is marked Municipal Fallback. That means the county profile should be treated as a routing brief: incorporated municipalities, a state building department, or a state fire marshal may control plan review, permits, and inspections. Contact the named agency below and verify the parcel’s jurisdiction before paying a fee or scheduling field work.
Responsible agency
Mercer County Regional Planning Commission and Mercer County Regional Council of Governments UCC program; municipalities and designated code agencies issue and inspect building permits
For a project in or near Mercer County, this office is the identified point of contact for permit intake, statutory code enforcement, plan review coordination, and inspection release conditions. Confirm the parcel’s boundary and project type before relying on the county lane.
Direct contact
Mercer County Government: 724-662-3800; Mercer County Regional Planning Commission: N/A on county site; Mercer County Regional Council of Governments UCC: 724-981-1561
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Mercer County Government Center, 125 South Diamond Street, Mercer, PA 16137; MCRCOG UCC office: 2495 Highland Road, Hermitage, PA 16148
Operating hours
Mercer County offices Monday-Friday, 8:30 a.m.-4:30 p.m.; MCRCOG Monday-Friday, 8:00 a.m.-4:00 p.m.; local code-agency hours vary
Review expectation
N/A countywide; Pennsylvania UCC generally requires a code official to grant or deny a complete application within 30 business days, while municipal or MCRCOG/code-agency timing varies. Land-development review timing depends on the applicable ordinance and completeness of the submission.
Compliance workbench
Choose the next project decision.
Apply online
Open the verified digital gateway, application form, and review timeline.
Open guide →Fees & penalties
Understand fee schedules, enforcement exposure, and stop-work liabilities.
Open guide →Codes & exemptions
Read the code framework, minor-work exemptions, and inspection lane.
Open guide →Agency website
Visit the primary public source for current notices and contact changes.
Open guide →Source trail
Official sources for this profile
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
Frequently asked questions for Mercer County
Who handles permitting for this jurisdiction?
This record is marked Municipal Fallback. Confirm whether a city, state agency, or other local authority controls the parcel before filing.
How should I begin an application?
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact Mercer County Government: 724-662-3800; Mercer County Regional Planning Commission: N/A on county site; Mercer County Regional Council of Governments UCC: 724-981-1561.
How long might review take?
N/A countywide; Pennsylvania UCC generally requires a code official to grant or deny a complete application within 30 business days, while municipal or MCRCOG/code-agency timing varies. Land-development review timing depends on the applicable ordinance and completeness of the submission.
How are inspections scheduled?
Contact the municipality where the work is located or the designated code agency. For municipalities using the Mercer County Regional Council of Governments program, contact MCRCOG at 724-981-1561 and follow its UCC application and inspection process; MCRCOG identifies Middle Department Inspection Agency as the inspection partner. The county planning commission or Mercer County Regional Planning Commission handles subdivision and land-development review, while UCC inspections remain local or contracted.
Which codes and exemptions should I review?
Pennsylvania Uniform Construction Code (UCC), 34 Pa. Code Chapters 401-405 and referenced current ICC codes as adopted by Pennsylvania, including applicable 2021 ICC editions for 2026 permits. Mercer County's official hazard mitigation plan states that county municipalities adhere to the UCC and all but one had opted in to local building-code enforcement. The Mercer County Regional Council of Governments operates a joint multi-municipal UCC enforcement program, and the county planning commission administers or supports countywide subdivision and land-development planning rather than issuing countywide building permits. UCC exemptions are controlled by Pennsylvania law and the responsible municipality or Building Code Official. Emergency repairs or equipment replacements may proceed without a permit only when the application is submitted to the BCO within three business days. Agricultural buildings and certain utility or miscellaneous buildings may be outside portions of UCC coverage, but zoning, stormwater, sewage, floodplain, occupancy, and local accessory-structure requirements can still apply. MCRCOG publishes project-specific requirement guides for participating municipalities.